| Reduced Risk Status: |
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| IPM Compatibility: |
Per Requester: Very Good Fit; Foliar applications of potassium phosphite have potential to be part of an integrated program for control of both Pythium pod rot and early and late leaf spot diseases of peanut. Their use would complement genetic and cultural practices used for leaf spot management, and would provide one of the few options for control of Pythium pod rot:06/25;
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| Reasons for need: |
Pythium pod rot of peanut (Pythium myriotylum); early leaf spot (Passalora arachidicola); late leaf spot (Nothopassalora personata). The target diseases are Pythium pod rot & certain foliar diseases (phosphite in combination with other registered products). Pythium pod rot is an important disease in most of the peanut production areas of the US. Phosphites are the only products useful against Pythium when applied by means other than irrigation systems. There is a need to address MRL issues in the EU for phosphorous acid (phosphites) fungicides. The orig proj consisted of 6 residue studies, however the EU now require 8 trials (EUROPEAN COMMISSION HEALTH & FOOD SAFETY DIRECTORATE-GENERAL This request is asking for 2 add'l res studies to satisfy the new EU requirement:06/25; NM: Occasionally an issue for peanut producers in Eastern NM depending on climatic conditions:08/25; MS: Phosphites also have unique bi-mobile distribution in the plant. All current fungicides labelled in peanut do not have this type of distribution within the plant. These labelled fungicides have very limited efficacy on soil-borne disease if rainfall or irrigation is not rec'd after application:08/25; SC: Targeted eff &distinct mode of action is a valuable tool for disease mgmt active ingredient stewardship programs:08/25; AR:Peanut in AR is nearly 100% irrigated by either pivot or furrow irrigation system. Thus, Pythium pod rot could be an important yield-limiting disease in the state/region with little or no options for mgmt:08/25; FL: Phytium pod rot incidence (number of peanut pods) is ubiquitous & in some fields the severity is high. Peanut yield losses in these severe infested fields may range in between 40 to 50% and quality is Seg 2:08/25; GA: Potassium phosphite, a fungicide & nutrient prod, offers a sustainable mgmt opt for these diseases while also enhancing overall plant health. Assessments from these trials can help determine the benefits of integrating potassium phosphite into a comprehensive disease mgmt program:08/25;
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| Requesting State(s): |
FL:Morichetti, S ; GA:Culbreath, A*, Oliveira, C, West, D ; MS:Zurweller, B, Henn, A ; NM:Robbins, C ; OK:Luper, C ; SC:Anco, D ;
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| PCR Use Pattern: |
Use Prophyt; 4 pints/A; 2 foliar application at 28 day interval; 0-day PHI; 4 hr REI
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| EPA Default Residue Trials: |
2-8 3 6-2 8
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| IR-4 Residue Trial Plan: |
Any 3 trials in peanut growing regions
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| Residue Protocol Use Pattern: |
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| Efficacy/Crop Safety (E/CS) Data Required: |
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| E/CS Research Comments: |
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| Label Use Pattern Submitted To EPA: |
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| EPA Status: |
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| MRID: |
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| Comments: |
This request is asking for 2 add'l trials to meet EU regulations and contains a different use pattern than PR# 12705 that consisted of 6 trials; Helena supports as Researchable, Only Residue Data Needed:09/25/sb; during the workshop, it was noted that the EU changed rules & needs an add'l 2-3 residue trials:09/25/sb;
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| International Status: |
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